How Many Astronomical Units Are In A Light Year?
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QUESTION #498 previous | next How many astronomical units are in a light year? Asked by: Justin Dopiriak
Answer
A good approximation would be: 1 light-year = 63240 AU (astronomical units) Just for information, 1 light-year is equivalent to the distance travelled by light in 1 year moving in a vacuum. 1 light-year is about 9.4607 * 1015 metres. 1 astronomical unit (AU) is equivalent to the average radius of the Earth's orbit. 1 AU is about 1.4960 * 1011 metres. Simple arithmetic calculation yields the answer that 1 light-year = 63240 AU to a good approximation. Answered by: Ryan Leong, Undergraduate, NUS, Singapore 'If you think education is expensive, try ignorance.'Derek Bok(1930-)Top 100 Lists:
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